LUO Wen-bin, WEN Lei1, LUO Hong-ze, SONG Ren-sheng, ZHAI Yu-chun, LIU Chang, Li Fen. Carbon nanotube-modified LiFePO4 for high rate lithium ion batteries. New Carbon Mater., 2014, 29(4): 287-294.
Citation:
LUO Wen-bin, WEN Lei1, LUO Hong-ze, SONG Ren-sheng, ZHAI Yu-chun, LIU Chang, Li Fen. Carbon nanotube-modified LiFePO4 for high rate lithium ion batteries. New Carbon Mater., 2014, 29(4): 287-294.
LUO Wen-bin, WEN Lei1, LUO Hong-ze, SONG Ren-sheng, ZHAI Yu-chun, LIU Chang, Li Fen. Carbon nanotube-modified LiFePO4 for high rate lithium ion batteries. New Carbon Mater., 2014, 29(4): 287-294.
Citation:
LUO Wen-bin, WEN Lei1, LUO Hong-ze, SONG Ren-sheng, ZHAI Yu-chun, LIU Chang, Li Fen. Carbon nanotube-modified LiFePO4 for high rate lithium ion batteries. New Carbon Mater., 2014, 29(4): 287-294.
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110004, China|
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China|
Funds:
State Key Development Program for Basic Research of China (973)(2011CB932604, 2014CB932402); National Natural Science Foundation of China (51172242, 51221264); “Strategic Prioristy Research Program of the Chi nese Acade my of Sciences(XDA01020304).
A hybrid cathode material for high rate lithium ion batteries was prepared by ball-milling and spray drying a slurry containing LiFePO4 nanoparticles, glucose and carbon nanotubes (CNTs) in water, followed by pyrolysis at 600 for 6 h under a gas mixture of 5% H2 in Ar. CNTs with a large aspect ratio form a continuous conductive network connecting the LiFePO4 nanoparticles and amorphous carbon, which significantly reduces the electrical resistance of the cathode. The hybrid material can deliver a specific capacity of 99 mAh / g at a 50 C charge / discharge rate. An excellent cycling performance was also demonstrated, with a capacity loss of less than 10% after 450 cycles at a 10 C rate.
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